CN114808565A - Construction method of polyurethane curing ballast bed - Google Patents
Construction method of polyurethane curing ballast bed Download PDFInfo
- Publication number
- CN114808565A CN114808565A CN202210240494.5A CN202210240494A CN114808565A CN 114808565 A CN114808565 A CN 114808565A CN 202210240494 A CN202210240494 A CN 202210240494A CN 114808565 A CN114808565 A CN 114808565A
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- Prior art keywords
- pouring
- ballast
- sleeper
- box
- polyurethane
- Prior art date
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Links
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 92
- 239000004814 polyurethane Substances 0.000 title claims abstract description 92
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 241001669679 Eleotris Species 0.000 claims abstract description 86
- 239000013589 supplement Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
- E01B3/44—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from other materials only if the material is essential
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a construction method of a polyurethane solidified track bed, wherein a box core railway ballast is reserved at a sleeper box, and compared with a through type ballast raking structure, the transverse resistance of the track bed is improved by 20-30%, so that the stability of a track after ballast raking is improved, the risk of a track expansion runway is reduced, namely the capability of the track for resisting external adverse factors is improved, the ballast raking amount and the railway ballast backfilling amount at the sleeper box are greatly reduced, and the construction efficiency is improved; the oscillating pouring of about 5cm is carried out on the basis of the pouring point, so that the section of the polyurethane curing ballast bed is more standard and full, the parameter index of the cured polyurethane curing ballast bed is superior to that of fixed-point pouring, the construction probability of reworking or material supplement caused by disqualification of the curing section caused by fixed-point pouring is obviously reduced, and the field practice shows that after the pouring point is adjusted to the oscillating small-range pouring from the fixed-point mode, the qualification rate of the curing section is improved by 30-45%, and the maintenance workload of the later-period curing ballast bed is greatly reduced.
Description
Technical Field
The invention relates to the field of ballast bed construction, in particular to a construction method of a polyurethane cured ballast bed.
Background
The polyurethane solidified track bed is a novel track bed structure following a ballast track and a ballastless track, and is characterized in that a mixture composed of isocyanate, polyether glycol and the like is poured in the ballast track bed which has reached a stable state, foaming, expansion and solidification are completed among the ballasts, so that a foamed polyurethane elastic material is extruded to fill gaps among the ballasts and firmly bonds ballast particles to form an elastic integral track bed structure, and the novel track structure has the advantages of the ballast track and the ballastless track.
In order to ensure the actual service life of the polyurethane curing ballast bed, the curing section is required to be full and full. At present, a 12-fixed-point-position pouring method is adopted in polyurethane curing ballast bed construction, namely large polyurethane pouring construction equipment is adopted, two sides of a sleeper along the line direction are respectively poured for 1 time, the pouring equipment comprises six pouring heads, the six pouring heads operate simultaneously when pouring is carried out once, a mixture is in inverted funnel type infiltration by taking a fixed point position as a center, foaming is completed among ballast particles, and finally an elastic whole is formed. However, when the 12 fixed point location pouring method is used, pouring equipment is affected by the fixed point locations, the positions of the sleeper boxes between the adjacent sleepers need to be pulled open in a through mode, the transverse resistance and the longitudinal resistance of a track bed are greatly reduced, and the capacity of a line for resisting an expansion track is weak when the ambient temperature changes; when the six pouring points are simultaneously cast at fixed points, the mixture is leaked downwards in an inverted funnel shape by taking the pouring points as the center, so that the material shortage on the upper trapezoidal part of the polyurethane curing ballast bed or the curing section is not full, and the service life of the polyurethane curing ballast bed is directly influenced.
Disclosure of Invention
The invention aims to provide a construction method of a polyurethane curing ballast bed, which ensures that the curing section of the polyurethane curing ballast bed has good size, is full and full, and further improves the stability of a track.
The technical scheme of the invention is as follows:
a construction method of a polyurethane curing ballast bed specifically comprises the following steps: firstly, laying a drainage mat, then pre-laying a railway ballast, laying a sleeper and a steel rail on the pre-laid railway ballast, sequentially performing layered ballast supplement, fine track finishing, quality acceptance of a railway with the ballast, ballast removal at a sleeper box and preheating and drying of a track bed, and finally performing polyurethane casting, pressure maintaining and acceptance to form a polyurethane cured track bed with a double-block type trapezoidal section;
after the quality of the ballast track is checked and accepted and before the track bed is preheated and dried, ballast is taken off at the position of a sleeper box, firstly, a box core ballast is arranged between two adjacent sleepers, namely the position of the sleeper box, the box core ballast is positioned in the middle of the sleeper box, the length of the box core ballast is not more than the distance between the top ends of two trapezoidal blocks of the polyurethane curing track bed, the central axis of the box core ballast is superposed with the longitudinal central axis of the sleepers, the parts of the sleeper box, which are positioned at the two ends of the box core ballast, are polyurethane pouring parts, the widths of the two polyurethane pouring parts at the sleeper box and the box core ballast are equal to the distance between the two adjacent sleepers, when the ballast is taken off at the sleeper box, the heights of the two polyurethane pouring parts and the top ends of the box core railway ballasts at the pillow box are higher than the height of the bottom end of the sleeper and lower than the height of the top end of the sleeper, the heights of the top ends of the two polyurethane pouring parts at the pillow box are consistent, and the heights of the top ends of the two polyurethane pouring parts at the pillow box are lower than the height of the top end of the box core railway ballast at the pillow box;
after ballast scraping at the sleeper box is completed, track bed preheating and drying are carried out, and then N pouring points which are transversely distributed along the sleeper are arranged on the two sides of each sleeper and located on each polyurethane pouring part, namely 2N pouring points are arranged on each polyurethane pouring part of each sleeper box, and the pouring points on the two sides of each sleeper are in one-to-one correspondence; n is an integer not less than 2;
when the polyurethane is poured, firstly pouring 2N pouring points on one side of the sleeper, then pouring 2N pouring points on the other side of the sleeper, and pouring sequentially according to the sequence of the sleeper, wherein the polyurethane pouring mode is two-point synchronous oscillation pouring, namely pouring sequentially from the two pouring points at two ends of the sleeper to the middle part of the sleeper, and during pouring, the two pouring points which are symmetrical along the longitudinal central axis of the sleeper are always synchronously poured, and the oscillation pouring mode is adopted for pouring the polyurethane at each pouring point.
After the quality of the ballast track is checked and accepted, the height of the top end of the ballast is equal to that of the top end of the box core ballast, when the box core ballast is arranged, the set length is reserved towards the two ends of the sleeper along the longitudinal central axis of the sleeper and is one half of the length of the box core ballast, then the ballast is taken off by two polyurethane pouring parts at the sleeper box, and the height of the top ends of the two polyurethane pouring parts at the sleeper box is lower than that of the top end of the box core ballast at the sleeper box.
The height of the top ends of the two polyurethane pouring parts at the pillow box is 4-6cm higher than that of the bottom end of the sleeper, and the height of the top end of the box core railway ballast at the pillow box is 8-10mm lower than that of the top end of the middle part of the sleeper.
And carrying out polyurethane pouring in an area which is 5cm left and right of each pouring point in an oscillating pouring mode.
When the polyurethane is poured, pouring points on two sides of each sleeper form a pouring station, after a plurality of set pouring stations are continuously poured, the pouring trolley is moved, and the pouring of a plurality of set pouring stations in the next stage is circularly carried out until the pouring of the pouring points at all the pouring stations is completed.
And after the plurality of set pouring stations are continuously poured, and when the polyurethane curing ballast bed parts at the plurality of set pouring stations are cured, maintaining the pressure of the curing polyurethane curing ballast bed.
In the whole polyurethane pouring process, the change condition of the elevation of the rail surface of the steel rail is monitored by a level gauge, so that the curing quality is controllable.
And after the polyurethane is poured, backfilling railway ballasts at the top end of the polyurethane curing railway bed of the sleeper box, wherein the height of the top end of the backfilled railway ballast is equal to that of the top end of the box core railway ballast, namely the railway ballast at the sleeper box is kept horizontally flat.
The invention has the advantages that:
according to the invention, the box core railway ballast is reserved at the sleeper box, and compared with a through type ballast raking structure, the transverse resistance of the railway bed is improved by 20-30%, so that the stability of the railway after ballast raking is improved, the risk of the track expansion is reduced, namely the capability of the railway for resisting external adverse factors is improved, the ballast raking amount and the railway ballast backfill amount at the sleeper box are greatly reduced, and the construction efficiency is improved.
According to the invention, the oscillation type pouring with the length of about 5cm is carried out on the basis of the pouring point location, so that the section of the polyurethane curing ballast bed is more standard and full, the parameter index of the cured polyurethane curing ballast bed is superior to that of fixed point pouring, the construction probability of rework or material supplement caused by unqualified cured sections during fixed point pouring is obviously reduced, and the field practice shows that after the pouring point location is adjusted to the oscillation type small-range pouring from a fixed point mode, the qualification rate of the cured sections is improved by 30-45%, and the maintenance workload of the later-period curing ballast bed is greatly reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of a box ballast according to the invention.
Fig. 2 is a schematic illustration of a longitudinal section of the inventive box ballast.
Fig. 3 is a top view of the inventive box ballast.
FIG. 4 is a view showing the layout of the polyurethane casting site according to the present invention.
FIG. 5 is a schematic cross-sectional view of a polyurethane cured track bed of the present invention.
Fig. 6 is a schematic longitudinal section structure of the ballast backfilled.
The method comprises the following steps of reference signs, 1-sleeper, 2-steel rail, 3-polyurethane curing track bed, 4-box core railway ballast, 5-polyurethane pouring part and 6-backfill railway ballast.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, a construction method of a polyurethane solidified track bed specifically includes the following steps:
firstly, laying a drainage mat, then pre-laying a railway ballast, laying a sleeper 1 and a steel rail 2 on the pre-laid railway ballast, sequentially performing layered ballast supplement, fine track finishing, quality acceptance of a railway with the ballast, ballast removal at a sleeper box and preheating and drying of a track bed, and finally performing polyurethane casting, pressure maintaining and acceptance to form a polyurethane cured track bed with a double-block type trapezoidal section;
after the ballasts are repaired in a layered mode, the height of the top end of each ballast is 10mm lower than that of the top end of the middle part of the sleeper 1; after the ballasts are mended in a layered mode and before the track bed is preheated and dried, a box core track ballast 4 is arranged between two adjacent sleepers 1, namely the positions of the sleepers, the box core track ballast 4 is positioned in the middle of the sleepers, the length of the box core track ballast 4 is not more than the distance between the top ends of two trapezoidal blocks of a polyurethane curing track bed 3, the central axis of the box core track ballast 4 is superposed with the longitudinal central axis of the sleepers 1, when the box core track ballast 4 is arranged, the box core track ballast 4 is reserved by 30 centimeters towards the two ends of the sleepers 1 along the longitudinal central axis of the sleepers 1, then ballast raking of the two polyurethane pouring parts at the sleepers is carried out, the parts at the two ends of the box core track ballast are polyurethane pouring parts 5, the widths of the two polyurethane pouring parts 5 and the box core track ballast 4 at the sleepers are both equal to the distance between the two adjacent sleepers 1, the height of the top ends of the two polyurethane pouring parts 5 at the box is 5 higher than the height of the bottom ends of the sleepers 1 by 5cm, the height of the top end of the box core railway ballast 4 at the sleeper box is 10mm lower than that of the top end of the middle part of the sleeper 1;
after ballast scraping at the sleeper box is finished, preheating and drying a track bed, arranging three pouring points which are transversely arranged along the sleeper at two sides of each sleeper 1 and are positioned on each polyurethane pouring part 5, wherein one pouring point is positioned at the inner side of the corresponding steel rail 2 and is 15cm away from the inner side edge line of the bottom of the steel rail 2, and the other two pouring points are positioned at the outer side of the corresponding steel rail 2 and are respectively 5cm and 40cm away from the outer side edge line of the bottom of the steel rail 2, namely each polyurethane pouring part 5 of each sleeper box is provided with six pouring points, and the pouring points at two sides of each sleeper 1 are in one-to-one correspondence;
when polyurethane is poured, firstly pouring six pouring points on one side of the sleeper 1, then pouring three pouring points on the other side of the sleeper 1, and pouring sequentially according to the sequence of the sleeper 1, wherein the polyurethane pouring mode is two-point synchronous oscillation pouring, namely pouring sequentially from two pouring points at two ends of the sleeper to the middle part of the sleeper, and during pouring, keeping two pouring points symmetrical along the longitudinal central axis of the sleeper to pour synchronously all the time, namely pouring 1 'and 1' synchronously, then pouring 2 'and 2', 3 'and 3', 4 'and 4', 5 'and 5', 6 'and 6', and pouring polyurethane in an oscillation pouring mode in an area which is 5cm left and right of each pouring point; when polyurethane is poured, the pouring amount is adjusted according to the thickness of the polyurethane curing track bed 3, the polyurethane material can be solidified to the bottom of the track bed, the size of the upper solidifying section of the polyurethane curing track bed 3 is 85-90cm, the size of the lower solidifying section of the polyurethane curing track bed 3 is 110-120cm, and in the whole process of polyurethane pouring, a water level gauge is used for monitoring the change condition of the rail surface elevation of the steel rail, so that the curing quality is controllable;
the pouring points on the two sides of each sleeper form a pouring station, after three pouring stations are continuously poured, the pouring trolley is moved, and the pouring of the three pouring stations at the next stage is circularly carried out until the pouring of the pouring points at all the pouring stations is finished; after three pouring stations are continuously poured, when the polyurethane curing ballast bed parts at the three pouring stations are cured, maintaining the pressure of the curing polyurethane curing ballast bed for not less than sixty minutes;
and after the polyurethane is poured, backfilling a railway ballast 6 at the top end of the polyurethane curing railway bed of the sleeper box, wherein the top end height of the backfilled railway ballast 7 is equal to that of the box core railway ballast 4, namely the railway ballast at the sleeper box keeps horizontal and flat.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A construction method of a polyurethane curing ballast bed specifically comprises the following steps: firstly, laying a drainage mat, then pre-laying a railway ballast, laying a sleeper and a steel rail on the pre-laid railway ballast, sequentially performing layered ballast supplement, fine track finishing, quality acceptance of a railway with the ballast, ballast removal at a sleeper box and preheating and drying of a track bed, and finally performing polyurethane casting, pressure maintaining and acceptance to form a polyurethane cured track bed with a double-block type trapezoidal section; the method is characterized in that:
after the quality of the ballast track is checked and accepted and before the track bed is preheated and dried, ballast is taken off at the position of a sleeper box, firstly, a box core ballast is arranged between two adjacent sleepers, namely the position of the sleeper box, the box core ballast is positioned in the middle of the sleeper box, the length of the box core ballast is not more than the distance between the top ends of two trapezoidal blocks of the polyurethane curing track bed, the central axis of the box core ballast is superposed with the longitudinal central axis of the sleepers, the parts of the sleeper box, which are positioned at the two ends of the box core ballast, are polyurethane pouring parts, the widths of the two polyurethane pouring parts at the sleeper box and the box core ballast are equal to the distance between the two adjacent sleepers, when the ballast is taken off at the sleeper box, the heights of the two polyurethane pouring parts and the top ends of the box core railway ballasts at the pillow box are higher than the height of the bottom end of the sleeper and lower than the height of the top end of the sleeper, the heights of the top ends of the two polyurethane pouring parts at the pillow box are consistent, and the heights of the top ends of the two polyurethane pouring parts at the pillow box are lower than the height of the top end of the box core railway ballast at the pillow box;
after ballast scraping at the sleeper box is completed, track bed preheating and drying are carried out, and then N pouring points which are transversely distributed along the sleeper are arranged on the two sides of each sleeper and located on each polyurethane pouring part, namely 2N pouring points are arranged on each polyurethane pouring part of each sleeper box, and the pouring points on the two sides of each sleeper are in one-to-one correspondence; n is an integer not less than 2;
when the polyurethane is poured, 2N pouring points on one side of the sleeper are poured firstly, 2N pouring points on the other side of the sleeper are poured again, and pouring is performed sequentially according to the sequence of the sleepers, the polyurethane pouring mode is two-point synchronous oscillation pouring, namely pouring is performed sequentially from the two pouring points at the two ends of the sleeper to the middle of the sleeper, and during pouring, the two pouring points symmetrical along the longitudinal central axis of the sleeper are kept synchronously, and polyurethane pouring is performed at each pouring point in an oscillation type pouring mode.
2. The method of claim 1, wherein the method comprises the steps of: after the quality of the ballast track is checked and accepted, the height of the top end of the ballast is equal to that of the top end of the box core ballast, when the box core ballast is arranged, the set length is reserved towards the two ends of the sleeper along the longitudinal central axis of the sleeper and is one half of the length of the box core ballast, then the ballast is taken off by two polyurethane pouring parts at the sleeper box, and the height of the top ends of the two polyurethane pouring parts at the sleeper box is lower than that of the top end of the box core ballast at the sleeper box.
3. The method of claim 1, wherein the method comprises the steps of: the height of the top ends of the two polyurethane pouring parts at the pillow box is 4-6cm higher than that of the bottom end of the sleeper, and the height of the top end of the box core railway ballast at the pillow box is 8-10mm lower than that of the top end of the middle part of the sleeper.
4. The method of claim 1, wherein the method comprises the steps of: and carrying out polyurethane pouring in an area which is 5cm left and right of each pouring point in an oscillating pouring mode.
5. The method of claim 1, wherein the method comprises the steps of: when the polyurethane is poured, pouring points on two sides of each sleeper form a pouring station, after a plurality of set pouring stations are continuously poured, the pouring trolley is moved, and pouring of a plurality of set pouring stations at the next stage is circularly carried out until pouring of the pouring points at all the pouring stations is completed.
6. The method of claim 5, wherein the curing step comprises the steps of: and after the plurality of set pouring stations are continuously poured, and when the polyurethane curing ballast bed parts at the plurality of set pouring stations are cured, maintaining the pressure of the curing polyurethane curing ballast bed.
7. The method of claim 1, wherein the method comprises the steps of: in the whole polyurethane pouring process, a level gauge is used for monitoring the change condition of the elevation of the rail surface of the steel rail, so that the curing quality is controllable.
8. The method of claim 1, wherein the method comprises the steps of: and after the polyurethane is poured, backfilling railway ballasts at the top end of the polyurethane curing railway bed of the sleeper box, wherein the height of the top end of the backfilled railway ballast is equal to that of the top end of the box core railway ballast, namely the railway ballast at the sleeper box is kept horizontally flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240494.5A CN114808565B (en) | 2022-03-10 | 2022-03-10 | Construction method of polyurethane curing ballast bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240494.5A CN114808565B (en) | 2022-03-10 | 2022-03-10 | Construction method of polyurethane curing ballast bed |
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| Publication Number | Publication Date |
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| CN114808565A true CN114808565A (en) | 2022-07-29 |
| CN114808565B CN114808565B (en) | 2023-05-23 |
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| CN202210240494.5A Active CN114808565B (en) | 2022-03-10 | 2022-03-10 | Construction method of polyurethane curing ballast bed |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1619305A2 (en) * | 2004-07-23 | 2006-01-25 | Frenzel-Bau GmbH | Track bed partly injected with foam |
| CN102950694A (en) * | 2011-08-16 | 2013-03-06 | 拜耳材料科技(中国)有限公司 | Polyurethane foaming device, its application and using method |
| CN103061215A (en) * | 2011-10-19 | 2013-04-24 | 拜耳材料科技(中国)有限公司 | Pouring machine mixing head mobile equipment and pouring system with the same |
| CN204116956U (en) * | 2014-08-28 | 2015-01-21 | 徐州徐工铁路装备有限公司 | Railway ballast curing apparatus casting trolley control system |
| CN204370247U (en) * | 2014-12-10 | 2015-06-03 | 中国铁路总公司 | Railway roadbed and there is its track-frame and track structure |
| KR20160012488A (en) * | 2014-07-24 | 2016-02-03 | 주식회사 이알에스 | Method For Stabilizing Ballast Track For Railroad |
| KR20170130919A (en) * | 2016-05-20 | 2017-11-29 | 박정근 | Stabilizing method using polyurethane resin and ballastslabbed using the same |
| CN111218857A (en) * | 2018-11-27 | 2020-06-02 | 科思创德国股份有限公司 | Method for preparing track bed |
-
2022
- 2022-03-10 CN CN202210240494.5A patent/CN114808565B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1619305A2 (en) * | 2004-07-23 | 2006-01-25 | Frenzel-Bau GmbH | Track bed partly injected with foam |
| CN102950694A (en) * | 2011-08-16 | 2013-03-06 | 拜耳材料科技(中国)有限公司 | Polyurethane foaming device, its application and using method |
| CN103061215A (en) * | 2011-10-19 | 2013-04-24 | 拜耳材料科技(中国)有限公司 | Pouring machine mixing head mobile equipment and pouring system with the same |
| KR20160012488A (en) * | 2014-07-24 | 2016-02-03 | 주식회사 이알에스 | Method For Stabilizing Ballast Track For Railroad |
| CN204116956U (en) * | 2014-08-28 | 2015-01-21 | 徐州徐工铁路装备有限公司 | Railway ballast curing apparatus casting trolley control system |
| CN204370247U (en) * | 2014-12-10 | 2015-06-03 | 中国铁路总公司 | Railway roadbed and there is its track-frame and track structure |
| KR20170130919A (en) * | 2016-05-20 | 2017-11-29 | 박정근 | Stabilizing method using polyurethane resin and ballastslabbed using the same |
| CN111218857A (en) * | 2018-11-27 | 2020-06-02 | 科思创德国股份有限公司 | Method for preparing track bed |
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| Publication number | Publication date |
|---|---|
| CN114808565B (en) | 2023-05-23 |
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